Stripes in Local Incidence Angle and Gamma-Sigma-Ratio when processing with COP-DEM EEA-10

[maawoo]

Vertical stripes might occur in the annotation layers -li.tif (Local Incident Angle) and -gs.tif (Gamma-Sigma-Ratio) after processing with the Copernicus 10m EEA DEM. The example below shows the Local Incident Angle of the RTC output:

This problem has already been reported in regard to the COP-DEM (Global 30m) auto-downloaded by SNAP: https://forum.step.esa.int/t/stripes-in-incidence-angle-after-terrain-correction/32164

It is possible that this issue has specifically been fixed for the COP-DEM auto-downloaded by SNAP, but not for COP-DEM tiles that have been downloaded from other sources and used as external DEMs in SNAP. We use the latter approach with COP-DEM tiles downloaded from the official data repository Panda.

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Software information:

    S1_NRB: 0.4.3.dev56+gddc1970
    snap-core: 8.0.9 | 202112101916
    snap-s1tbx: 8.0.6 | 202202100514
    python: 3.9.13 | packaged by conda-forge | (main, May 27 2022, 16:56:21) 
[GCC 10.3.0]
    python-pyroSAR: 0.17.0
    python-spatialist: 0.11.0
    python-GDAL: 3.5.0
    gdal_threads = 4

[florianbeyer]

@maawoo Off Topic: Is there a short command to get the software information, you gave in the end of your post?

[maawoo]

@florianbeyer This information is written as a header into each log file that is created by the processor

[maawoo]

This is also occurring when using SNAP 9 and only if Copernicus 10m EEA DEM is used.